Put the verbs in brackets into the present perfect or continuous.
1. A: Sandra ………………………… (teach) geography since she left university.
B: Yes, and she's a very good teacher, too.
2. A: How long .................................................. (you/know) Helen?
B: We .................................................. (be) friends since we were children.
3. A: Who .................................................. (use) my laptop?
B: I have. Is there a problem?
4. A: What are Mike and Joe doing?
B: They .................................................. (work) in the garden for three hours.
5. A: You look exhausted.
B: Well, I .................................................. (clean) the windows since 8 o'clock this morning.
6. A: Have you found your umbrella yet?
B: No, I .................................................. (look) for it for an hour now.
7. A: Have you got new neighbors?
B: Yes, they .................................................. (just/move) to the area.
8. A: Why is Mary upset?
B: She .................................................. (lose) her mobile phone.
9. A: Bill .................................................. (open) a new café.
B: Really? Where is it?
10. A: I .................................................. (always/believe) that exercise is good for you.
B: Of course, it's good to keep fit.